Combination office-chair and operating-table



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. F. E. GRAVES. COMBINATION OFFICE CHAIR AND OPERATING TABLE.

Patented Feb. 14, 1888.

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COMBINATION OPFIGE CHAIR. AND OPERATING TABLE. No. 377,806. Patented Feb.. 14,1888.

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' UNITED STATES PATENT OFFIC FRED E. GRAVES, OF ROCKFORD, ILLINOIS.

COMBINATION OFFICE-CHAIR AND OPERATlNG-TABLEL SPE CIPICATION forming part of Letters Patent No. 377,806, dated February 14, 1888.

Application filed March 7, 1887. Serial No. 230,038. (N 0 model.)

To all whom it may concern:

Be it known that 1, FRED E. GRAVES, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Combination Office- Chairs and Operating-Tables for the Use of Surgeons and General Medical Practitioners, of which the following is a specification.

The object of this invention is to provide surgeons and the medical profession generally which form a part of this specification, Figure 1 represents an isometrical viewof my combined office-chair and operating-table arranged-except unfolding the cushions-as a short operating-table. Fig. 2 represents a side elevation of the same arranged as a fulllength operating-table,with cushions unfolded and placed in proper positions therefor. Figs. 3 and 4 represent isometric views of my invention arranged as an office-chair. Figs. 5 and 6 represent views in detail of portions of the foregoing figures.

Like letters of reference indicate cor responding parts throughout the several views.

A A represent, respectively, pairs of legs hinged at their upper ends, so as to admit of adjustment, like a pair of compass-legs.

A A represent horizontal frame-work securing the legs A A together.

A 4 A represent uprights framed into the parts A A a represents transverse slots in the outside of the legs A.

B B represent toothed bars or racks secured to the uprights A A and provided with retaining-slots B B 0 represents'a locking-frame hinged at G, for locking the legs A A together after being set at the desired angle of inclination.

D D represent, respectively, the side pieces and an end piece of the main frame-work or body of the table-top and chair-back.

D represents a fiat panel rabbeted into the frame-work D D and having its upper surface covered, preferably with canvas.

D represents the body of the combined chair and table as an entirety.

D represents a bolt connecting the legs A 'A and side pieces, I), together, and'forming a' hinge-joint for the same. 7

E E represent the frame-work of a headrest,whi ch-also serves as a foot-rest in the fulllength operating-table.

E represents a flat panel rabbeted into the F, F F and F represent cushions, which are folded, as shown in Figs. 1, 3, and 4, when the piece of furniture is in use as a chair, but which are unfolded, as shown in Fig. 2, when the same has been converted into a full-length operating-table. The upper surfaces of the cushions F, F F and F*, when unfolded and arranged as shown in Fig. 2, are one continuous piece of canvas. Any other suitable material may be substituted for canvas, if desired.

F represents theheadrest or chair-seat as an entirety, according to the function it is made to perform.

G represents a segment-rack or toothed segm'ent,which performs the triple functions ofa foot-rest or stirrup, a head-rest support, and a chair'seat support, as indicated in Figs. 1, 2, and 3, respectively. r

G represents peripheral slots in the segment rack G.

G represents a spur continuous with the segment-rack G and having the vertical slot G in the upper side thereof.

H H represent combined bar-detents for locking the head-rest chair-seat in any desired position within the limits of the mechanism shown. The inner end of the bar-detent H is provided with a longitudinal slot, H. The inner end of the bar-detent H is provided with a spur, H having an eye, H, in the free end thereof. The slot H and spur H just described together form ahinge-joint peculiarly adapted to the use which it serves.

H represents screws which secure the bardetents H H to the head-rest F and serve as bearings whereon they move whenever the head-rest is unlocked and adjusted to a new position.

- I represents a spiral spring which forces the outer ends of the bar-detents H H into the slots G and retains them there.

J J represent tilting legs for supporting the body D of the combined chair and table and the attachments thereof at any angle of inclination desired by an operator. The tilting leg J is hinged at J. A bolt, J, forms a hinge-bearing for the parts G, F, D, and J.

K represents a cross-bar secured to the legs A, which serves the double office of strengthening the legs A and of engaging the slot G of the segment-racks G and locking the same when the article of furniture is iniuse as a chair.

K represents braces, preferably continuous with the cross-bar K, which, while they serve to strengthen the legs A, are intended mainly for guiding the tilting leg J5 upward when the left end of the chair-body D is depressed, and retaining it in the position shown in Fig. 4, the free end of the tilting leg J engaging in its upward course the free end of tilting leg J and confining the same in the position also indicated in Fig. 4.

1. The combination, with the chair back and seat, of the legs A, provided with slots at, and secured together by framework, the tilting legs J J, the toothed bar B, and the lockingframe 0, substantially as set forth.

2. In a combination oflice-chair and operating-table, the segment'rack having the spur G continuous therewith, the upper side of said spur being provided with a slot, G the cross-bar K, the chair-seat, and bar-detents H H attached thereto, substantially as described, and for the purpose specified.

3. The combination, with the main framework D, of the head-rest E, hinged to one end of said frame-work, the chair-seat F hinged to the other end of the frame-work D, the segment-racks G, pivotally mounted upon the framework D, and the bar detents H H, adapted to engage wit-h and lock the segmentracks G. for the purpose set forth.

4. The combination, with the legs A A, of thelocking-frame 0, main frame-work D, headrest E, chair-seat F, the segment-rack G, bardetents H H, and tilting legs J J, substantially as described, and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 23d day of March, A. D. 1886.

FRED E. GRAVES.

Witnesses:

J No. M. EDIE, L. L. MORRISON. 

